Makes you wonder if there's any place on the human anatomy, you can't do it. With the possible exceptions of a Toe, Finger and Nose.
Yes dear, I've spent $2,000 on Eyeball implants, so now Eyeballs will stay perfectly moist, all day loing, and no Dry Eye ever again.
Look they put a tiny little implant just behind each Sclera, near the tear duct, so you'll never notice, unless I get stoned

Calves are a bit of a difficult area, because they're very small, and comprise the Soleus and the Medial and Lateral Gastrocnemius, so you're working two very small areas, not even one moderately sized area. Even though the Calf looks like one complete muscle, not a combination of more than one.